/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/ldv-regression/mutex_lock_struct.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 16:11:50,600 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 16:11:50,603 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 16:11:50,639 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 16:11:50,640 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 16:11:50,650 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 16:11:50,652 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 16:11:50,655 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 16:11:50,660 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 16:11:50,661 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 16:11:50,662 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 16:11:50,664 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 16:11:50,665 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 16:11:50,666 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 16:11:50,667 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 16:11:50,669 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 16:11:50,670 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 16:11:50,671 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 16:11:50,673 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 16:11:50,676 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 16:11:50,678 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 16:11:50,681 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 16:11:50,683 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 16:11:50,684 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 16:11:50,694 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 16:11:50,714 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 16:11:50,720 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 16:11:50,724 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 16:11:50,726 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 16:11:50,781 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 16:11:50,781 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 16:11:50,786 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 16:11:50,787 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 16:11:50,787 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 16:11:50,788 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 16:11:50,788 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 16:11:50,788 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 16:11:50,788 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 16:11:50,788 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 16:11:50,790 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 16:11:50,790 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 16:11:50,790 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 16:11:50,791 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 16:11:50,791 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 16:11:50,791 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 16:11:50,792 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 16:11:50,792 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:11:50,792 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 16:11:50,792 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 16:11:50,793 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 16:11:50,793 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 16:11:50,793 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 16:11:50,794 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 16:11:50,794 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 16:11:50,794 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 16:11:51,213 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 16:11:51,242 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 16:11:51,245 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 16:11:51,246 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 16:11:51,247 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 16:11:51,248 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/mutex_lock_struct.i [2021-01-06 16:11:51,321 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/335e15240/c85383f3ab154721868818d9a5b6701f/FLAG2edf3f231 [2021-01-06 16:11:51,971 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 16:11:51,971 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/ldv-regression/mutex_lock_struct.i [2021-01-06 16:11:51,981 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/335e15240/c85383f3ab154721868818d9a5b6701f/FLAG2edf3f231 [2021-01-06 16:11:52,346 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/335e15240/c85383f3ab154721868818d9a5b6701f [2021-01-06 16:11:52,351 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 16:11:52,354 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 16:11:52,358 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 16:11:52,358 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 16:11:52,363 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 16:11:52,364 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:11:52" (1/1) ... [2021-01-06 16:11:52,366 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ef34e99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:11:52, skipping insertion in model container [2021-01-06 16:11:52,367 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:11:52" (1/1) ... [2021-01-06 16:11:52,380 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 16:11:52,401 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 16:11:52,599 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/ldv-regression/mutex_lock_struct.i[295,308] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a,],base],StructAccessExpression[IdentifierExpression[~a,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~b,],base],StructAccessExpression[IdentifierExpression[~b,],offset]]] left hand side expression in assignment: lhs: StructLHS[VariableLHS[~m~0,],is_locked] [2021-01-06 16:11:52,623 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:11:52,635 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 16:11:52,663 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/ldv-regression/mutex_lock_struct.i[295,308] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a,],base],StructAccessExpression[IdentifierExpression[~a,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~b,],base],StructAccessExpression[IdentifierExpression[~b,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#m~0,],base],StructAccessExpression[IdentifierExpression[~#m~0,],offset]]] [2021-01-06 16:11:52,670 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:11:52,688 INFO L208 MainTranslator]: Completed translation [2021-01-06 16:11:52,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:11:52 WrapperNode [2021-01-06 16:11:52,689 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 16:11:52,690 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 16:11:52,690 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 16:11:52,690 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 16:11:52,700 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:11:52" (1/1) ... [2021-01-06 16:11:52,708 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:11:52" (1/1) ... [2021-01-06 16:11:52,729 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 16:11:52,733 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 16:11:52,733 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 16:11:52,733 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 16:11:52,744 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:11:52" (1/1) ... [2021-01-06 16:11:52,744 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:11:52" (1/1) ... [2021-01-06 16:11:52,747 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:11:52" (1/1) ... [2021-01-06 16:11:52,747 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:11:52" (1/1) ... [2021-01-06 16:11:52,753 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:11:52" (1/1) ... [2021-01-06 16:11:52,756 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:11:52" (1/1) ... [2021-01-06 16:11:52,757 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:11:52" (1/1) ... [2021-01-06 16:11:52,759 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 16:11:52,760 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 16:11:52,760 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 16:11:52,760 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 16:11:52,761 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:11:52" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:11:52,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 16:11:52,885 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 16:11:52,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 16:11:52,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 16:11:52,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 16:11:52,885 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 16:11:52,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 16:11:53,100 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 16:11:53,100 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2021-01-06 16:11:53,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:11:53 BoogieIcfgContainer [2021-01-06 16:11:53,102 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 16:11:53,104 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 16:11:53,104 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 16:11:53,107 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 16:11:53,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 04:11:52" (1/3) ... [2021-01-06 16:11:53,108 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aea7bef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:11:53, skipping insertion in model container [2021-01-06 16:11:53,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:11:52" (2/3) ... [2021-01-06 16:11:53,109 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aea7bef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:11:53, skipping insertion in model container [2021-01-06 16:11:53,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:11:53" (3/3) ... [2021-01-06 16:11:53,111 INFO L111 eAbstractionObserver]: Analyzing ICFG mutex_lock_struct.i [2021-01-06 16:11:53,117 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 16:11:53,122 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2021-01-06 16:11:53,142 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-01-06 16:11:53,171 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 16:11:53,171 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 16:11:53,171 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 16:11:53,171 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 16:11:53,172 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 16:11:53,172 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 16:11:53,172 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 16:11:53,172 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 16:11:53,189 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2021-01-06 16:11:53,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-01-06 16:11:53,194 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:11:53,195 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-01-06 16:11:53,195 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:11:53,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:11:53,203 INFO L82 PathProgramCache]: Analyzing trace with hash 925605, now seen corresponding path program 1 times [2021-01-06 16:11:53,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:11:53,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558023732] [2021-01-06 16:11:53,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:11:53,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:11:53,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:11:53,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558023732] [2021-01-06 16:11:53,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:11:53,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 16:11:53,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684730151] [2021-01-06 16:11:53,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 16:11:53,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:11:53,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 16:11:53,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:11:53,538 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 3 states. [2021-01-06 16:11:53,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:11:53,565 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2021-01-06 16:11:53,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 16:11:53,568 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2021-01-06 16:11:53,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:11:53,577 INFO L225 Difference]: With dead ends: 25 [2021-01-06 16:11:53,577 INFO L226 Difference]: Without dead ends: 8 [2021-01-06 16:11:53,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:11:53,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-01-06 16:11:53,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-01-06 16:11:53,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-01-06 16:11:53,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 7 transitions. [2021-01-06 16:11:53,630 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 7 transitions. Word has length 4 [2021-01-06 16:11:53,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:11:53,631 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 7 transitions. [2021-01-06 16:11:53,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 16:11:53,631 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 7 transitions. [2021-01-06 16:11:53,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-01-06 16:11:53,632 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:11:53,632 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:11:53,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 16:11:53,632 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:11:53,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:11:53,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1810629644, now seen corresponding path program 1 times [2021-01-06 16:11:53,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:11:53,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296963041] [2021-01-06 16:11:53,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:11:53,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 16:11:53,665 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 16:11:53,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 16:11:53,689 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 16:11:53,716 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-01-06 16:11:53,717 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-01-06 16:11:53,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 16:11:53,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 04:11:53 BoogieIcfgContainer [2021-01-06 16:11:53,765 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 16:11:53,766 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 16:11:53,766 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 16:11:53,766 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 16:11:53,767 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:11:53" (3/4) ... [2021-01-06 16:11:53,770 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-01-06 16:11:53,834 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/ldv-regression/mutex_lock_struct.i-witness.graphml [2021-01-06 16:11:53,835 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 16:11:53,839 INFO L168 Benchmark]: Toolchain (without parser) took 1482.98 ms. Allocated memory is still 158.3 MB. Free memory was 133.6 MB in the beginning and 122.4 MB in the end (delta: 11.2 MB). Peak memory consumption was 10.8 MB. Max. memory is 8.0 GB. [2021-01-06 16:11:53,840 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 158.3 MB. Free memory is still 129.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 16:11:53,846 INFO L168 Benchmark]: CACSL2BoogieTranslator took 330.98 ms. Allocated memory is still 158.3 MB. Free memory was 133.4 MB in the beginning and 123.9 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-01-06 16:11:53,847 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.32 ms. Allocated memory is still 158.3 MB. Free memory was 123.8 MB in the beginning and 122.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-06 16:11:53,847 INFO L168 Benchmark]: Boogie Preprocessor took 26.07 ms. Allocated memory is still 158.3 MB. Free memory was 122.4 MB in the beginning and 121.4 MB in the end (delta: 951.5 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 16:11:53,849 INFO L168 Benchmark]: RCFGBuilder took 342.11 ms. Allocated memory is still 158.3 MB. Free memory was 121.3 MB in the beginning and 109.3 MB in the end (delta: 12.0 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-01-06 16:11:53,850 INFO L168 Benchmark]: TraceAbstraction took 661.63 ms. Allocated memory is still 158.3 MB. Free memory was 108.9 MB in the beginning and 124.5 MB in the end (delta: -15.6 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 16:11:53,854 INFO L168 Benchmark]: Witness Printer took 68.89 ms. Allocated memory is still 158.3 MB. Free memory was 124.0 MB in the beginning and 122.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 16:11:53,867 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 158.3 MB. Free memory is still 129.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 330.98 ms. Allocated memory is still 158.3 MB. Free memory was 133.4 MB in the beginning and 123.9 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 41.32 ms. Allocated memory is still 158.3 MB. Free memory was 123.8 MB in the beginning and 122.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 26.07 ms. Allocated memory is still 158.3 MB. Free memory was 122.4 MB in the beginning and 121.4 MB in the end (delta: 951.5 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 342.11 ms. Allocated memory is still 158.3 MB. Free memory was 121.3 MB in the beginning and 109.3 MB in the end (delta: 12.0 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 661.63 ms. Allocated memory is still 158.3 MB. Free memory was 108.9 MB in the beginning and 124.5 MB in the end (delta: -15.6 MB). There was no memory consumed. Max. memory is 8.0 GB. * Witness Printer took 68.89 ms. Allocated memory is still 158.3 MB. Free memory was 124.0 MB in the beginning and 122.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L35] struct mutex m; [L36] m.is_locked = 0 [L23] EXPR a->is_locked [L23] COND FALSE !(a->is_locked == 1) [L24] a->is_locked = 1 [L23] EXPR a->is_locked [L23] COND TRUE a->is_locked == 1 [L15] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 15 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 11 SDtfs, 0 SDslu, 7 SDs, 0 SdLazy, 5 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 11 NumberOfCodeBlocks, 11 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 3 ConstructedInterpolants, 0 QuantifiedInterpolants, 15 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...